actively exploited · CISA KEV

CVE-2026-81578

NVD CRITICAL 9.8 · published 2026-08-28 · 2 on the wire

An improper access control vulnerability exists in the web management interface of PaperCut MF and PaperCut NG. Under specific conditions, unauthenticated remote requests targeting administrative functions can trigger backend actions prior to the completion of access validation checks. This allows an unauthenticated remote attacker to modify certain system configurations.

Exploited in the wild

Yes

CISA added it 2026-08-31. An observation, not a forecast.

EPSS · 30-day forecast

Chance of exploitation in the next 30 days, 88th percentile of all CVEs. A forecast; KEV outranks it.

CVSS · NVD

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Internet exposure

—

No exposure census on this CVE's dispatches.

On the wire2

References

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